a:5:{i:0;s:2:"id";i:1;s:6:"a_word";i:2;s:6:"b_word";s:3:"_pk";s:2:"id";s:5:"_type";a:3:{s:2:"id";s:7:"int(11)";s:6:"a_word";s:11:"varchar(12)";s:6:"b_word";s:11:"varchar(12)";}}